PFA vs PTFE : une comparaison ultime

PFA (Perfluoroalkoxy alkane) are copolymers of tetrafluoroethylene et perfluoroethers required for devices exposed to harsh biological and chemical elements.

PTFE (Polytétrafluoroéthylène) is a fluoropolymer containing fluorine and carbon atoms. It is known for its resistance to chemicals and micro porous nature making it water repellent

PFA VS PTFE History

Polytetrafluoroethylene (PTFE): It was discovered in 1938 by an American chemist Roy J. Plunkett at Du Pont Company. He was in charge of looking after a specific tetrafluoroethylene sample. An accidental discovery was found as he was attempting to create a high quality coolant gas. The sample was taken out and they found out a waxy white texture coating due to the gas polymerizing. This material has been used many years.

Perfluoroalkoxy alkaline (PFA: It was made to cover PTFE limitations like their differences in melting points.

Comparing PFA and PTFE Properties

PFA Properties

PFA material is known for non-flammable, high chemical resistance, low coefficient of friction, high purity, high dielectric strength and Low moisture absorption

Propriétés du PTFE

PTFE is popular for its high density at 2200kg/m3, high electrical resistance and dielectric strength, hydrophobic nature, intense flexural strength and low friction coefficient.

PFA Vs. PTFE Advantages

PFA Advantages

• Transparency form making it ideal for making laboratory equipment
• It is easy to re-mould and weld
• Haute résistance chimique
• Exceptional resistance to high temperature
• High purity levels

PTFE Advantages

• Propriétés antiadhésives
• Haute résistance chimique
• Easy to install PTFE liner
• Corrosive resistant
• Non flammable

PFA and PTFE Disadvantages

Although these materials have superior properties in modern applications, they have certain limitations. These limitations include:

PFA Disadvantages

• Low flex durability compared to PTFE
• Low permeation
• Expensive compared to PTFE

PTFE Disadvantages

• Can revert to its original shape after installed
• It is not easy to manufacture in large quantities
• Material not easily weldable

Applications: PFA and PTFE

Some common practical applications of these materials include:

PFA Applications

It is used to make laboratory and medical plastic equipment because it can withstand chemical corrosion. Additionally, it can act as sheet lining for chemical containers.

Other applications include tubing for fluid passage like pipelines and extreme temperature uses. More importantly, it is a perfect choice where high purity is a priority.

Applications du PTFE

It is used to make nonstick cooking pans due to its hydrophobic and non-stick properties. Where you wish to reduce friction, PTFE coating or material is always a perfect alternative.

Due to its chemically inert properties, it is used in tanks that store reactive fluids. Remember, PTFE is highly non-reactive due to its inertness from fluorine atoms.

Conclusion

With this information, you can choose whether to choose PFA or PTFE for any applications. For all you PTFE products, HANSA is here to help.